Aspirator device for smoke and airing conduits



Feb. 9, 1943. PETROVITCH 2,310,909

ASPIRATOR DEVICES FOR SMOKE AND AIRING CONDUITS Filed Feb. 26, 1940 2 Sheets-Sheet 1 to Q U S AM 0) II- l ul-nl wg Flux/1f LOUIS PETRoVITcH Feb. 9, 1943. PETROVlTcH 2,310,909

ASPIRATOR DEVICES FOR SMOKE AND AIRING CONDUITS Filed Feb. 26, 1940 2 Sheets-Sheet 2 9 m wm Q Lou s DETROVITCH Patented Feb. 9, 1943 ASPIRATOR DEVICE FOR SMOKE AND AIRING CONDUITS Louis Petrovitch, Paris, France; vested in the Alien Property Custodian Application February 26, 1940, Serial No. 320,976 In Luxemburg February 27, 1939 4 Claims.

This invention relates to aspirator devices for smoke and airing conduits.

Aspirator devices for smoke and other fluids are known which comprise openings distributed on the periphery of the central casing or chamber and directly communicating with the outside. Among other disadvantages these devices offer the inconvenience-that they often allow the rain and impurities of all kinds of penetrating in large quantities, thus rendering a forcing back action unavoidable, especially in devices having a large diameter.

Attempts have been made in order to avoid such disadvantages by placing curved screens in front of the discharge openings; such a device can insure tightness, but it entails another drawback for not only it considerably lessens the delivery of the fluid to be removed, but with a wind of high velocity the forcing back occurs. Indeed, for instance, when the wind through compression penetrates between the curved screen and the walls of the discharge openings it becomes compressed and crosses flush with the openings, thus cutting oii the fluid vein. Then the air jets follow the outline of the device and approach the next screen on which they are compressed again, thus renewing the above described ;nconvenience. Therefore, the zone of depression becomes almost naught on a plurality of openings, thus rendering the suction a trifling one.

in order to remedy this, the inventor has already devised an aspirator which is described in his French Patent No. 710,359 of April 30, 1930, and characterized by a central chamber having a cylindrical or elliptical shape and comprising two diametrically opposed openings in front of each of which a deflecting screen is placed.

The addition No. 39,957 of August i, 1930, continuing the said patent describes an improvement in and relating to the above mentioned device and essentially consisting in providing one or more openings in the deflecting screens with which the said device is provided and in arranging, in front of the said openings, auxiliary screens forming channels which are preferably convergent-divergent.

In practice, this device has proved satisfactory with devices having a small diameter, but devices of a large diameter require a special and consequcntly expensive method of construction; furthermore they are Very cumbersome.

For this reason the inventor has devised a novel combination of elements the characteristic features of which form the subject matter of the present invention.

This invention consists in providing a static aspirator with a uniform depression for smoke or airing conduits or the like, characterized by the combination with a plurality of vertical and horizontal walls forming fluid outlets between them of a plurality of wings corresponding to each of the said openings and being formed of elements with deflecting walls, the said wing being for the purpose of deflecting the wing towards the outside to a suitable distance from the aspirator walls so as to produce a strong depression in the fluid supply casing and to insure the tightness of the device.

The general features of the present invention will appear more clearly when referring to the appended drawings, which are given by way of example and in which:

Figure 1 is a partly elevational and partly sectional view through the line a-a-a of Figure 5 of a form of execution of the invention Figure 2 is a partly elevational and partly sectional View through the line b-b-b of Figure 6.

Figure 3 is an elevational view of Figure '7 with a partly sectional view of the aspirator according to the line c-c-c.

Figure 4 is an elevational view of Figure 8 showing a half of the aspirator.

Figure 5 is a horizontal sectional view through the line 0-0 of Figure 1.

Figure 6 is a horizontal sectional view through the line d-d of Figure 2.

Figure '7 is a horizontal sectional view through the line e-c of Figure 3.

Figure 8 is a horizontal sectional view through the line ,f of Figure 4.

Figures 9 through 16 also show horizontal sectional views of halves of the embodiments of the device according to the invention.

On all the figures I designating the connect ing sheath.

On all the figures i2 designates the central chamber of the aspirator, the said chamber being defined by vertical walls .3 spaced or separated by openings 4 for the discharge of the fluid coming from the said central chamber 2.

The wings which characterize the invention are placed in front of the openings 4. In Figures 1 and 5 the said wings comprise an outer screen 5 located at a certain distance from the corresponding opening 4 and on either side of the said opening the said screen is connected with the adjacent walls 3 by one or more intermediary deviating walls which are horizontally arranged,

as shown at 6 and 6a. The said walls could also be arranged vertically, as shown at 9 and 9a,, 9b, 9c in the Figures 7 and 8 or in any other direction or according to a combination of these various methods.

Owing to the provision of these deviating walls 6, 6a, 9, 9a, 9b, 90, it is possible to increase considerably the delivery of the fluid to be removed while maintaining the tightness, by moving the outer screen 5, a and 5b forwardly in order to provide a channel It and Illa having preferably a section which is at least equal to the section of the outlet 4. Thus a throttling of the outlet is avoided which would interfere with the free delivery of the fluid, such a throttling being due either to the width of the outer screen 5 or to its too small distance from the outlet 4,

The walls 3 and 3a, 3b, 3c, 3d, 36, 3f, of the central chamber combined with the deviating walls 6, 6a, 9, 9a, 9b, 90 will preferably .be flush with the stiffening edge (see Figures 5 and 6'), but they could receive any other configurations such as those which are shown, for instance, at 3b and 3c, 3d in Figures '7 through 16.

The vertical walls of the device are preferably connected together through the cap 8 and the foot piece I (see Figure 1). The horizontal walls are maintained through the vertical walls. The device can be provided with the connecting sheath I. It is also possible to arrange under the cap 8 and inwardly of the device a conical part II the apex of which is directed downwardly, in order that the fluid which rises inwardly of the device may be deviated outwardly.

The operation of this device is easy to conceive.

Suppose that the wind arriving between the wings strikes against the wall 3 of the aspirator (see Figure 5). It is deviated outwardly by this wall through the channels I0. On crossing in front of the openings 4 the wind produces a depression that is to say a strong suction in the fluid supply sheath 2.

If the wind arrives perpendicularly to the screen 5, it is also deviated outwardly and slips away by passing in front of the wings, thus producing a depression in front of the channels I0 and Ida and the openings 4, that is to say a strong suction as in the foregoing case.

Thus, whatever may be the direction of the wind, an automatic and permanent suction of the fluids to be removed is produced.

Of course, the forms of execution as above described are of no limitative character and any desired modifications can be brought to the construction of the same without departing from the scope of the invention.

What I claim is:

1. An aspirator of the character described comprisin a plurality of vertically extending plates mounted to form the peripheral wall of an outlet chamber, adjacent plates being peripherally spaced to provide a plurality of outlet openings in the peripheral wall of said chamber, a plurality of vertically extending screens of a width greater than the distance between adjacent plates of the chamber wall and positioned on the outside of said wall one over each opening and spaced outwardly from the wall at distance to provide openings of an area at least equal to the area of the openings covered by the screen, and a plurality of vertically spaced horizontally extending deviating bafiles positioned in the openings between the screen and the wall of the chamber.

2. An aspirator of the character described comprising a plurality of vertically extending plates mounted to form the peripheral wall of an outlet chamber, adjacent plates being peripherally spaced to provide a plurality of outlet openings in the peripheral wall of said chamber, a plurality of vertically extending screens of a width greater than the distance between adjacent plates of the chamber wall and positioned on the outside of said wall one over each opening and spaced outwardly from the wall at distance to provide openings of an area at least equal to the area of the openings covered by the screen, and a plurality of horizontally spaced vertically extending and vertically spaced horizontally extending baffles positioned in the openings between the screen and the wall of the chamber.

3. An aspirator of the character described comprising a plurality of vertically extending plates mounted to form the peripheral wall of an outlet chamber, adjacent plates being peripherally spaced to provide a plurality of outlet openings in the peripheral wall of said chamber, a plurality of vertically extending screens of a width greater than the distance between adjacent plates of the chamber wall and positioned on the outside of said wall one over each opening and spaced outwardly from the wall at distance to provide openings of an area at least equal to the area of the openings covered by the screen, a plurality of vertically spaced horizontally extending deviating baffles positioned in the openings between the screen and the wall of the chamber, and the side edges of said plates having outwardly projecting portions tending to reduce the space between the edges and the screen to increase the Venturi effect on streams of air flowing between the screen and said edges to increase the aspiration of gas out through said openings.

4. An aspirator of the character described com.- prising a plurality of vertically extending plates mounted to form the peripheral wall of an outlet chamber, adjacent plates being peripherally spaced to provide a plurality of outlet openings in the peripheral wall of said chamber, a plurality of vertically extending screens of a width greater than the distance between adjacent plates of the chamber wall and positioned on the outside of said wall one over each opening and spaced outwardly from the wall at distance to provide openings of an area at least equal to the area of the openings covered by the screen, a plurality of horizontally spaced vertically extending and vertically spaced horizontally extending baffles positioned in the openings between the screen and the wall of the chamber, and the side edges of said plates having outwardly projecting portions tending to reduce the space between the edges and the screen to increase the Venturi elfect on streams of air flowing between the screen and said edges to increase the aspiration of gas out through said openings.

LOUIS PETROVITCH. 

